Extension table



J. S. KNECHTEL EXTENSION TABLE Oct. 10, 1933.

Filed Jan. 14, 1932 2 Sheets-Sheet l III/I4 lnlntor. Jaco S. KHeC/1fel.

Patented Oct. ll

cairn srArEfs' fra'renrorrcs 1,929,820 ExTENsIoN TA B LE I Jacob S.Knechtel, Hanover; Ontario, Canada Application January 14, 1932; SerialNo. 585,636

4 Claims. ((31. 45 -112) The principal objects of this invention are toprovide an extension table which may be operated with very great ease toeither extended or closed positions, and to devise a construction ofextremely simple form which will be inexpensive to manufacture and verydependablein operation. I I

A further object is .to provide an extension table with an extensionleaf having side rails corresponding with the side rails of the tabletop.

The principal features of the invention consist in the novelarrangernentof an extension leai between the extension slide and'the" permanenttable top whereby said leaf is retained in its central position and inthe novel construction and arrangement of a lever carried by theadjustable slide and co-operating with cam blocks on the extension leafwhereby said leaf is raised 01' lowered vertically. I I

A further feature of importance consists in the arrangement ofhinged-side rails corresponding with the side rails of the table mountedon the extension leaf to complete the side rail of the table when in itsextended position.

'In the accompanying drawings, Figure 1 is an underside plan View of myimproved table top shown in the closed position.

igure 2 is an underside plan view of the table top shown in the.extended position, one of the side rails on the extension leaf being.folded and the other opened to the extended position.-

Figure 3 is a cross sectional View through the line 3-3 of Figure 1.

Figure 4 is a longitudinal sectional view of one end of the table, takenthrough the line 4-4 of Figure 1. Y

On reference to the accompanying drawings it will be seen that the tabletop is formed of two movable portions 1 and 2 which are preferablyconstructed with the moulded side rails 3. The outside extension slidebars 1, which are of the usual construction, are here shown secured tothe underside of the top of the movable portion 1 and the inside slidebars 5 are secured to the underside of the top of the movable portion 2and between these arearranged the central slide bars 6, each set of barsbeing slidably connected in the usual manner by dove tail tongue andgroove slide connection.

Thecentre bars 6 are of slightly greater depth than the bars 4 and 5 andthe top and bottom surfaces thereof extend slightly above and below theinside and outside bars.

. The centre'bars are supported on any desirable form of leg supports 7.

1n the centre of each of the bars 6 and on the underside is pivotallymounted a spur gear 8 and rack bars 9 secured to the underside of theinner and outer slide-bars mesh with these gears to operate both endsofthe table simultaneously.

Thisarrangement of spur gears and racks is quite common. 1

The outside and inside slide bars are spaced from the underside of, thetable top bythe bars 10 and 11 respectively, the space being slightlygreater than the thickness of the table top. These spacer bars extendfrom the outside ends of the table top inwardly andthe inner ends arespacedfapart'a distance slightly greater than I the width of theextension leaf 12, which-rests 76' between them upon the top of thecentre eXtension bar. 7 7

Each of the centre extension bars is provided with a vertical hole 13which isslightly offset I from the pivot of the gears and pins '14secured in the leaf 12, preferably centrally thereof, extend into theseholes and fit quite loosely therein. These pins hold the extension leafin a cen tralized position both longitudinally and transversely of thetable. I I

Bars 15' are secured to the underside of the extension leaf preferablyoutside of the extension 'slide bars and are adapted to engage theunderside of the portions 1 and 2 to ensure the alignment of the leafwith the table top when the leaf is raised and also to prevent thedisp1acement of the leaf.

A pair of cam blocks 16 and 17 are secured in offset relation to theunderside of the leaf 12 preferably adjacent to the longitudinal edges.These blocks are formed with bevelled inward ends.

A cross bar 18 is secured between the inside slidebars 5 and ispreferably set diagonally, the ends thereof being rabbeted into grooves19 in the inner sides of said bars.

A lever 20, which may be formed of a bar of wood, is pivotally mountedon a bolt 21 secured in the cross bar 18. This lever is preferably ofangled form, the inward end 22 thereof being cut 100 to extend at anobtuse angle from the outer portion. This lever is adapted upon beingswung on its pivot to engage the bevelled end of both of the cam blocks16 and 1'? simultaneously when thetable portions 1 and 2 have been drawnout to in Figure l or in the extended position in align-- ment with theside rails of the table. Such friction hinges are quite commonly knownin the furniture art and their construction need not' b described indetail. I

It will be readily appreciated that a table constructed as described isof very simple form and its operation is so simplethat even a smallchild can quite easily operate it.

To operate the table it is merely necessary to pull upon either end whenthe movable portions 1 and 2 will slide apart to their maximumposition.- This'movement brings the pivot bolt of the lever to a centralposition as shown inFigure 2 underneath the extension leaf. By reachingunder the table top and grasping the knob 24;, the operator then=merelyswings'the lever on its pivot and the lever engaging thebevelle'd'en'dsof the cam blocks lifts the leaf into'a position level with' thetabletop, it'beingheld-to its central-position by the pins 14 engagingthe sides ofthe holes -13.

The leaf-will beheld in its raised position supported by-the-rigid leverwith the-extending ends of" the crossbars 15' preferably snugly engagingtheunderside ofthe adjacent table top sections I and 2-. The siderailsare then swung "downwardly and the ends of the table can then be movedinwardly-to close'tightly against the centre In closing the table" it is"merely necessary to fold in='the-side'"rails, swing-the l'ever*20 onits pivotto lower the centreleaf; then pushtheend members'together.

What-I claim as' my invention is:

1. In an extension table, the'combinati'on with a pa-ir of -table f topsmounted upon extension slides, of a leaf housed beneath the "movablemembers of the table top and supported on said extension slides, meansfor holding said leaf from lateral or longitudinal displacement, a crossbar extending between and connected with. the inner extension slides, apivot bolt secured to said cross bar, a lever pivoted on said pivot boltabove the cross bar and extending transversely of said leaf, andbevelled blocks arranged on the underside of said leaf and directlyengaged by said lever at spaced points either side of its pivot. I r

2. In'an extension table, the combination with a pair-of separable tabletops mounted on extension slides, of a leaf member housed beneath thetable tops and movable vertically, cam blocks sloping longitudinally ofthe leaf at the side edges thereof, a lever pivotally supported on a'verti cal pivot below said leaf and extending longitudinally betweensaid extension slides and'directly engagingsaid cam blocks: initsswinging movement to raise and lcwer'said leaf said lever being ofangledform with the inner and outer portionsthereof -radiating fromsaid. pivot in angular relation to each othenarid a handleextension'"fromj the outer portion of said lever accessible between theslid'e'extensions at the end of the table.

4. In an extension table, the combination with a "pair of table tops'mount'e'd upon I extension slides, of a leaf housed beneath the tabletops and movable vertically, said leaf presenting cammedsurfaces slopingin the longitudinal direction thereof and a swingablen eans arrangedlongitudinally ofthe table and movable into and out'of directoperativeengagement with said 1 cammed surfacesin its swinging movement to raiseandl'ower said movable leaf. 7 JACOB S. KNECHTEL.

